Violet cotton-dye.



@verized are dark powders soluble in water,

ED sTATEs ATENT OFFICE.

ex WEILER, or ELEEnEELn, eE nAnY,'AssIe1voa To SYNTHETIC PATENTS co., INC., 'O F NEW YORK, N. Y., A CORPORATION OF NEW YORK.

VIOLET COTTON-DYE.

No Drawing.

To all wkomtt may concern:

Be it known that I, MAX WEILER, doctor of philosophy, chemist, citizen of the German Empire, residing at Elberfeld, Germany, have invented new and useful Improvements in Violet Cotton-Dyes, of which the following is a specification.

My invention relates to the manufacture and production of new and valuable dyestufls of the triphenylmethane series which are very suitable for printing purposes. They are obtained by treating with s'ulfonating agents the coloring matters having the following general formula:

R and R meaning aryl radicals ofan aromatic ox'ycarboxylic acid, such as of salicylic or cresotinic acid, R a divalent aryl radical, such as O H and Rm an aryl radical such as phenyl, naphthyl, henzyl, etc. These dyestufls which I use as starting materials can be obtained by condensing. aromatic aldehydes, such asbenzaldehyde, with an aromatic oxycarboxylic acid, such ascresotinic acid, oxidizing and sulfonating the resulting condensation products and condensing the sulfonic acids with an aromatic amin which replaces the sulfonic group.

My new dyes, after being dried and pulin some cases with difficulty, and generally with'a violet coloration. They furnish violet shades on being printed upon cotton together with a chrome mordant.

In order to illustrate the new process more fully the following example is given the parts being by weight: 100 parts of the dye OCH

noocYk/E,

= Specification of Letters Patent.

' solution.

Patented. Oct. 23, 1917.

Application filed: September 22, 1915. Serial No. 52,077.

ing sulfuric acid are added and the mixture is stirred until a te t portion is soluble in water. Subsequently the mixture is stirred into me water, the dye E 'ena- By printing it together with a chrome mordant on cotton bright violet shades are obtained.

Other of the above mentioned coloring matters are obtained in an analogous way, on starting 6. g. from dyes which contain instead of the paratoluidin radical other radicals of aromatic amins c. g. the'radicals of paraand meta-chloroanilin, 2-chloro--l toluidin, asymmetric meta-xylidin, .m-toluidin, beta-naphthylamin, etc.

I claim 1. The new dyes which can be obtained by sulfonating a triphenylmethane dye of the formula:

wherein R and R stand for aryl radicals of an aromatic oxycarboxylie acid, R represents a divalent aryl radical, and Rm represents aryl, which dyes after being dried and pulverized are dark powders soluble in a water generally with a violet coloration and furnishing on cotton violet shades on being printed together with a chrome mordant substantially as described,

2. The new dyes which are obtainable by 45 achrome mordant, substantially as desoribed.-

. sents a divalent aryl radical of the benzene I a series and R represents a sulfo aryl, which wherein-R andRI stand for'aryl radicals of "an aromatic oxycarboxylic acid of theben zene series, R represents a divalent aryl' 25l I sent's a sulfo aryl, which dyes after'being sulfonating a 'triphenylmethane compound "and which have most probably the formula:

wherein R and R stand for aryl radicals of an aromatic oxycarboxylic acid, R repredyes after being dried andfipulverized are dark powders generally soluble in water with a, violetcoloration and furnishing on cotton violet shades on being printed together with a chrome mordant, substantially l-as described.

.3. The new dyes whichfare'obtainable by h sulfonating a. triphenylmethane compound andwhich have most probably-the formula:

radical of the benzene series and R repre- 3 dried and pulverized are darkpowders gen- I 1 tion and furnishing on cotton violet shades i 30 erally soluble in water with a violet coloraon being printed together with a chrome 'inordant,substantiallyas described. h v 4. The new dyes which-are robtainableby ,sulfonating a triphenylmethane compound and-which" have most probably the formula: a Q R p p cZ-R;x-NER11 wherein R. and R standi or aryl radicals of. an oxycarboxytoluen nRn represents a divalent aryl radical of the benzene series after-being driedand pulverized are dark powders generally solublefifi water with a.

', e e y hich-are obtainable by wherein R and R stand-for aryl radicals of an oxycarboxytoluene, R represents a divalent aryl radi'cal of the benzene series and pulverized. are dark powders generally furnishing on cotton lviolet shades on'being printed. together with a] chrome mordant substantially as described.

probably the formula u I ""03, 1' i 'a'brown powder soluble in W'atenwith-a violet coloration and furnishing bright vio.

and Rm represents a sulfoaryl of the ben-t zene series, which dyes after being dried soluble in water with a violet coloration and 9' let shades on being printed upon cottont'ogether with a chrome mordant, substantially i as described. I n

- In testimony whereof l-have hereunto set my hand in. the presence of two subscribing .v

witnesses.

' 7' ,W'itnessesi- ALBERT N UFER, FnANonsfNm nm I 

